During one of his missionary journeys St. Paul visited Ephesus in Turkey.
He stays in the city about three years (Acts 19:1-20). In Ephesus Paul discovers twelve believers who were baptized but who did'nt as yet have God's spirit. Paul baptizes them in His name and they receive God's Holy Spirit (Acts 19:1-7).

In looking at the letters to the 7 Churches, we see the Lord speaking directly to the 7 Churches
that existed in the Holy land at the time John lived. We also see the Lord's opinion of those Churches, and what they were doingat the time: Ephesus, Pergamon, Laodicea, Sardis, Thyatira, Smyrna, Philadelphia churches.

Turkey is called the Other Holy Land as it has more biblical sites than any other country in the Middle East.Antioch - the place where the followers of Jesus were first called Christians; Tarsus - where Apostle Paul was born and many others..

to the angel of the church in Philadelphia, write
this:
'' The holy one, the true, who holds the key of David, who opens and no
one shall close, who closes and no one shall open, says this: "I know
your works (behold, I have left an open door before you, which no one
can close). You have limited strength, and yet you have kept my word and
have not denied my name. Behold, I will make those of the assembly of
Satan who claim to be Jews
and are not, but are lying, behold I will make them come and fall
prostrate at your feet, and they will realize that I love you.

Because you have kept my message of endurance, I will keep you safe in
the time of trial that is going to come to the whole world to test
inhabitants of the earth. I am coming quickly. Hold fast to what you
have, so that no one may take your crown.

The victor I will make into a pillar in the temple of my God, and he
will never leave it again. On him I will inscribe the name of my God and
the name of the city of my God, the new Jerusalem, which comes down out
of heaven from my God, as well as my new name."
"Whoever has ears ought to hear what the Spirit says to the churches."

(Rv 3:7-13)
The church in Philadelphia (3:713) stood at an important junction of
the imperial post road that ran from Rome through Troas, Pergamum, and
Sardis on through to Tarsus and the East. They had an open door through
which to share the gospel.

Yet here too a synagogue of Satan opposed the believers. Although no
archaeological evidence for a synagogue has been found, a 3rd-century
A.D. inscription was found 10 miles east of the city mentioning a
synagogue of the Hebrews. Philadelphia was located in an
earthquake-prone region called the Catacecaumene.

Both Sardis and Philadelphia were devastated by earthquakes in A.D. 17.
Asian temples were built to withstand severe earthquakes. Their
foundations were laid on beds of charcoal covered with wool fleeces,
which caused the structure to float on the soil like a raft. Each
block was joined to another by metal cramps, so that the platform was a
unity.

The temple would be the most secure structure in the city, hence the
promise to be a pillar in the temple of God was one of security and
safety. Inscribed pillars are found throughout Aegean Turkey. A dramatic
example is the temple of Zeus at Euromos with dedicatory inscriptions on
ten
of the eleven standing pillars. Jesus will write divine names as well as
his new name on those human pillars who overcome.

Philadelphia received a new name twice in the first century: the first
time after the A.D. 17 earthquake to Neocaesarea in gratitude for
Tiberius generosity, the second time to Flavia after Vespasian gave
financial assistance following a similar catastrophe.